Battery devices and electrical appliances

Abstract

A battery device (100) and an electrical device belong to the field of battery technology. The battery device (100) includes a housing (11), a first mounting beam (14), a second mounting beam (15), a battery cell (12) assembly, and a heat exchanger (13). The first mounting beam (14) and the second mounting beam (15) are spaced apart within the housing (11) and together with the housing (11) form a battery compartment. The battery cell (12) assembly is disposed in the battery compartment and includes a first end plate (16), a second end plate (17), and a plurality of battery cells (12) disposed between the first end plate (16) and the second end plate (17). The first end plate (16) and the second end plate (17) are respectively connected to the first mounting beam (14) and the second mounting beam (15). The heat exchanger (13) is disposed in the battery compartment and cooperates with the battery cell (12) assembly for heat exchange. The heat exchanger (13) includes an inlet and outlet section (131). In this design, the first mounting beam (14) has an opening groove on one side of the wall near the housing (11) where the heat exchanger (13) is located. The opening of the opening groove faces the wall. The side of the first mounting beam (14) away from the opening groove is connected to the first end plate (16). The inlet and outlet (131) passes through the opening groove. The battery device (100) described above has high reliability.

Description

Battery device and electric device TECHNICAL FIELD

[0001] The present application relates to the technical field of battery, in particular to a battery device and an electric device. BACKGROUND

[0002] Energy saving and emission reduction is the key to the sustainable development of the automobile industry. Electric vehicles have become an important part of the sustainable development of the automobile industry due to their energy saving and environmental protection advantages. For electric vehicles, battery technology is an important factor for their development.

[0003] How to improve the reliability of the battery device is a problem to be solved in the battery technology.

[0004] SUMMARY

[0005] In view of the above problems, the present application provides a battery device and an electric device, which can improve the reliability of the battery device.

[0006] In a first aspect, the present application provides a battery device, which comprises a box body, a first mounting beam, a second mounting beam, a battery monomer assembly and a heat exchange element. The first mounting beam and the second mounting beam are arranged in the box body in a spaced manner, and together with the box body form a battery compartment. The battery monomer assembly is arranged in the battery compartment and comprises a first end plate, a second end plate and a plurality of battery monomers arranged between the first end plate and the second end plate. The first end plate and the second end plate are connected to the first mounting beam and the second mounting beam respectively. The heat exchange element is arranged in the battery compartment and exchanges heat with the battery monomer assembly. The heat exchange element comprises an inlet and outlet part. The first mounting beam forms an open slot on the side close to the wall of the box body where the heat exchange element is arranged. The slot opening of the open slot faces the wall. The side of the first mounting beam away from the slot opening is connected to the first end plate. The inlet and outlet part is arranged in the open slot.

[0007] In the above scheme, since the first end plate is arranged on the side of the first mounting beam away from the slot opening, the connection stability between the first end plate and the first mounting beam is basically not affected by the open slot. When the battery monomers swell, the first end plate can better resist the swelling force of the battery monomers. The swelling force in the battery monomer assembly is more evenly distributed, and the reliability of the battery device is higher.

[0008] In one or more embodiments of the first aspect, the first mounting beam comprises at least two beam bodies arranged in a spaced manner along a first direction. The gap between the adjacent two beam bodies forms the open slot.

[0009] In the above scheme, since the open slot is formed by the gap between the adjacent two beam bodies, the structural stability of a single beam body is stronger, and the bearing capacity is more stable.

[0010] In one or more embodiments of the first aspect, the battery device further comprises a connecting bracket connecting the at least two beam bodies.

[0011] In the above solution, the connecting bracket is arranged to make the two adjacent beam bodies as a whole have higher structural stability.

[0012] In one or more embodiments of the first aspect, at least part of the connecting bracket is located between the first end plate and the first mounting beam.

[0013] In the above solution, since at least part of the connecting bracket is located between the first end plate and the first mounting beam, the connecting bracket can provide a certain bearing capacity for the first end plate, so that the first end plate and the first mounting beam have higher connection stability, and thus the expansion force of the battery monomer assembly is more evenly distributed when the battery monomer expands and deforms.

[0014] In one or more embodiments of the first aspect, the connecting bracket covers the gap in the thickness direction of the wall body.

[0015] In the above solution, since the connecting bracket covers the gap in the thickness direction of the wall body, most of the area of the connecting bracket can be used as the connection position of the connecting bracket and the first end plate, which is conducive to providing more connection points for the first end plate and improving the structural stability of the first end plate.

[0016] In one or more embodiments of the first aspect, the connecting bracket is provided with a first mounting hole, the first mounting beam is provided with a second mounting hole, and the first end plate is connected to the first mounting beam by a fastener penetrating the first mounting hole and the second mounting hole.

[0017] In the above solution, the first end plate, the connecting bracket and the first mounting beam are connected by the fastener, so that the assembly deformation is small and the cost is low.

[0018] In one or more embodiments of the first aspect, the box body comprises a bottom wall for supporting the battery monomer assembly; the first mounting beam has a first surface facing away from the bottom wall; the connecting bracket comprises a main body portion and a first flange portion, the main body portion is connected to the first surface and covers the gap, and the first flange portion extends from one side of the main body portion away from the inlet and outlet portion to the bottom wall, and the first flange portion blocks the gap.

[0019] In the above solution, since the first flange portion blocks the gap, the first flange portion can also resist the expansion and deformation of the battery monomer on the side close to the bottom wall at the gap position, reducing the risk of stress concentration during the expansion and deformation of the battery monomer, so that the battery monomer assembly has higher stability and improves the reliability of the battery device.

[0020] In one or more embodiments of the first aspect, the first mounting beam has a second surface facing away from the inlet and outlet portion, and the first flange portion does not protrude from the second surface.

[0021] In the above scheme, since the first flanging portion does not protrude from the second surface, the first flanging portion does not occupy the assembly space of the battery monomer, and the energy density of the battery device is improved.

[0022] In one or more embodiments of the first aspect, the first flanging portion is not in contact with the heat exchange member.

[0023] In the above scheme, since the first flanging portion is not in contact with the heat exchange member, the first flanging portion does not interfere with the heat exchange member, and the risk of the first flanging portion scratching the heat exchange member is low, and the service life of the heat exchange member is long.

[0024] In one or more embodiments of the first aspect, the connecting bracket further comprises a second flanging portion, and the second flanging portion extends from the main body portion to the bottom wall on a side close to the inlet and outlet portion.

[0025] In the above scheme, the first flanging portion and the second flanging portion are provided to pre-position the connecting bracket when the connecting bracket is matched with the first mounting beam, and the assembly difficulty of the connecting bracket is reduced.

[0026] In one or more embodiments of the first aspect, the connecting bracket further comprises a reinforcing member, and the reinforcing member is arranged on a side of the main body portion facing the first surface, and the reinforcing member is located in the gap.

[0027] In the above scheme, even if part of the first end plate is arranged at a position corresponding to the gap, since the reinforcing member is arranged at a position where the connecting bracket covers the gap, the connecting bracket can still provide a relatively stable bearing force to the first end plate, so that the first end plate has a relatively high connection stability.

[0028] In one or more embodiments of the first aspect, the heat exchange member comprises a first heat exchange pipe and a second heat exchange pipe; the first mounting beam comprises a first beam body, a second beam body and a third beam body arranged at intervals, and two ends of the first heat exchange pipe pass through the gap between the first beam body and the second beam body, and two ends of the second heat exchange pipe pass through the gap between the second beam body and the third beam body.

[0029] In the above scheme, the two heat exchange pipes pass through different gaps, so that there is still a second beam body between the positions where the two heat exchange pipes pass through the first mounting beam, and the first end plate has a relatively high connection stability.

[0030] In one or more embodiments of the first aspect, the heat exchange member comprises a first heat exchange pipe and a second heat exchange pipe; the first mounting beam comprises a fourth beam body and a fifth beam body arranged at intervals, and two ends of the first heat exchange pipe pass through the gap between the fourth beam body and the fifth beam body, and two ends of the second heat exchange pipe pass through the gap between the fourth beam body and the fifth beam body.

[0031] In the scheme, the two heat exchange pipes pass through the first mounting beam from the same gap, which can reduce the design and processing difficulty of the first mounting beam, and save production cost.

[0032] In one or more embodiments of the first aspect, the box body comprises a bottom wall for supporting the battery cell assembly. A side of the bottom wall facing the battery cell assembly is formed with a groove, and the heat exchange member is embedded in the groove.

[0033] In the scheme, the groove can be used to pre-position the heat exchange member when assembling the heat exchange member, which reduces the assembly difficulty of the heat exchange member.

[0034] In one or more embodiments of the first aspect, along the thickness direction of the bottom wall, the surface of the heat exchange member facing the battery cell assembly is flush with the surface of the bottom wall facing the battery cell assembly.

[0035] In the scheme, since the surface of the heat exchange member facing the battery cell assembly is flush with the surface of the bottom wall facing the battery cell assembly, part of the weight of the battery cell assembly can be borne by the bottom wall, which reduces the risk of deformation damage of the heat exchange member due to excessive stress, and improves the reliability of the battery device.

[0036] In one or more embodiments of the first aspect, the heat exchange member comprises a first heat exchange pipe and a second heat exchange pipe; the first heat exchange pipe has a first pipe segment and a second pipe segment arranged side by side and extending in a zigzag manner, one end of the first pipe segment is connected with the inlet and outlet portion, one end of the second pipe segment is connected with the inlet and outlet portion, and the other end of the first pipe segment is connected with the other end of the second pipe segment; the second heat exchange pipe has a third pipe segment and a fourth pipe segment arranged side by side and extending in a zigzag manner, one end of the third pipe segment is connected with the inlet and outlet portion, one end of the fourth pipe segment is connected with the inlet and outlet portion, and the other end of the third pipe segment is connected with the other end of the fourth pipe segment.

[0037] In the scheme, since the first pipe segment and the second pipe segment extend in a zigzag manner, and the third pipe segment and the fourth pipe segment extend in a zigzag manner, the heat exchange member can have a higher heat exchange area in the same space, which improves the energy density of the battery device. Moreover, since the first pipe segment and the second pipe segment are arranged side by side, and the third pipe segment and the fourth pipe segment are arranged side by side, the temperature of the heat exchange area formed by the corresponding part between the first pipe segment and the second pipe segment is relatively uniform, and the temperature of the heat exchange area formed by the corresponding part between the third pipe segment and the fourth pipe segment is relatively uniform, so that the temperature difference of the first heat exchange pipe as a whole and the second heat exchange pipe as a whole is relatively uniform, the risk of thermal stress concentration is relatively low, and the reliability is relatively high.

[0038] In one or more embodiments of the first aspect, the first heat exchange pipe and the second heat exchange pipe are arranged symmetrically.

[0039] In the scheme, since the first heat exchange pipe and the second heat exchange pipe are arranged symmetrically, the positioning of the two heat exchange pipes is easier, and the assembly difficulty is lower.

[0040] In one or more embodiments of the first aspect, the first mounting beam is a continuous beam.

[0041] In the above scheme, since the first mounting beam is a continuous beam, the first mounting beam has a lower processing cost and a lower assembly difficulty.

[0042] In a second aspect, the application provides a battery device, which comprises the battery device in the above scheme.

[0043] Since the battery device in the above scheme has high reliability, the power consumption device comprising the battery device in the above scheme also has high reliability.

[0044] The above description is only a summary of the technical scheme of the application. In order to enable the technical means of the application to be more clearly understood, and to be implemented according to the content of the description, and in order to enable other purposes, features and advantages of the application to be more apparent and easy to understand, the following specific embodiments of the application are described. BRIEF DESCRIPTION OF DRAWINGS

[0045] Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The accompanying drawings are included to provide a description of the preferred embodiments and are not meant to limit the present application. Furthermore, the same reference numerals are used throughout the several views that follow. In the drawings:

[0046] FIG. 1 is a structural schematic diagram of a vehicle according to some embodiments of the application;

[0047] FIG. 2 is an exploded view of a battery device according to some embodiments of the application;

[0048] FIG. 3 is a partially exploded view of a structure of a battery device according to some embodiments of the application;

[0049] FIG. 4 is a partial enlarged view of A in FIG. 3;

[0050] FIG. 5 is a partially exploded view of a structure of a battery device according to some other embodiments of the application;

[0051] FIG. 6 is a partial enlarged view of B in FIG. 5;

[0052] FIG. 7 is an axonometric view of a connecting bracket according to some embodiments of the application;

[0053] FIG. 8 is a schematic diagram of a partial structure of a battery device according to some embodiments of the application;

[0054] FIG. 9 is a sectional view of a partial structure of a battery device according to some embodiments of the application;

[0055] FIG. 10 is a partial enlarged view of C in FIG. 9.

[0056] The reference signs in the detailed description of the embodiments are as follows: 1000-vehicle; 200-controller; 300-motor; 100-battery device; 11-box body; 111-first box body; 112-second box body; 113-bottom wall; 12-battery cell; 13-heat exchange member; 131-inlet / outlet portion; 132-first heat exchange pipe; 133-second heat exchange pipe; 14-first mounting beam; 141-first surface; 142-second surface; 143-first beam body; 144-second beam body; 145-third beam body; 15-second mounting beam; 16-first end plate; 17-second end plate; 18-connection bracket; 181-main body portion; 182-first flange portion; 183-second flange portion; 184-stiffener; X-first direction. DETAILED DESCRIPTION

[0057] The embodiments of the technical solutions of the present application will be described in detail below with reference to the drawings. The following embodiments are only used to more clearly illustrate the technical solutions of the present application, and therefore only serve as examples, and cannot limit the protection scope of the present application.

[0058] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the present application; the terms "include" and "have" and any variations thereof used in the specification and claims of the present application and the above description of the drawings are intended to cover the non-exclusive inclusion.

[0059] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "a plurality of" is two or more, unless otherwise explicitly and specifically limited.

[0060] Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the present application. The appearance of the phrase in various places in the specification does not necessarily all refer to the same embodiment, nor is it necessarily mutually exclusive or alternative to other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0061] In the description of the embodiments of the present application, the term "a plurality of" refers to two or more (including two), and similarly, "a plurality of groups" refers to two or more groups (including two groups), and "a plurality of pieces" refers to two or more pieces (including two pieces).

[0062] In some high-power applications such as electric vehicles, the application of battery apparatus includes three levels: battery cell, battery module, and battery apparatus. A battery module is formed by electrically connecting a certain number of battery cells together and placing them in a frame in order to protect the battery cells from external impacts, heat, vibration, etc. A battery apparatus refers to the final state of the battery apparatus system installed in an electric vehicle. The battery apparatus referred to in embodiments of the present application refers to a single physical module including one or more battery cells to provide higher voltage and capacity. The battery apparatus generally includes a case for packaging one or more battery cells. The case can reduce the risk of liquid or other foreign matter affecting the charging or discharging of the battery cells.

[0063] The battery apparatus referred to in embodiments of the present application can include one or more battery cell assemblies for providing voltage and capacity. The battery cell assembly can include a plurality of battery cells connected in series, in parallel, or in a mixed connection through a busbar component.

[0064] In some embodiments, the battery cell assembly is generally formed by arranging a plurality of battery cells; as an example, the battery cell assembly can be a battery module formed by arranging and fixing a plurality of battery cells into an independent module. As an example, the battery module can be formed by bundling a plurality of battery cells with a cable tie.

[0065] In some embodiments, the battery apparatus can be a battery pack including a case and one or more battery cell assemblies housed in the case.

[0066] As an example, the battery cell assembly can be a battery module, and the battery cell assembly can be housed in the case by fixing the battery module in the case.

[0067] As an example, the battery cell assembly can also be housed in the case by directly fixing a plurality of battery cells in the case.

[0068] Hereinafter, mainly rectangular battery cells will be described. It should be understood that the embodiments described hereinafter are also applicable to cylindrical battery cells or pouch battery cells or blade battery cells in some aspects.

[0069] In a general battery cell structure, the battery cell includes a housing, an electrode assembly, and an electrolyte. The housing includes an end cap and a case, and the end cap closes the opening of the case to define a receiving space for receiving the electrode assembly.

[0070] The development of battery technology needs to consider various design factors, such as energy density, cycle life, discharge capacity, charge-discharge rate, and other performance parameters, and the reliability of the battery device.

[0071] The end plate of the general battery monomer assembly is mounted on the mounting beam, and in some battery devices, the heat exchange member passes through the mounting beam in the box. At this time, the connection stability between the end plate and the mounting beam is poor due to the interruption of the mounting beam. When the battery monomer expands and deforms, the end plate may not be able to well resist the deformation of the battery monomer, resulting in a high risk of battery monomer connection failure and inability to extract electrical energy. The reliability of the battery device is poor.

[0072] Therefore, the present application provides a battery device. The battery device includes a box, a first mounting beam, a second mounting beam, a battery monomer assembly, and a heat exchange member. The first mounting beam and the second mounting beam are arranged in the box and form a battery compartment together with the box. The battery monomer assembly is arranged in the battery compartment and includes a first end plate, a second end plate, and a plurality of battery monomers arranged between the first end plate and the second end plate. The first end plate and the second end plate are connected to the first mounting beam and the second mounting beam, respectively. The heat exchange member is arranged in the battery compartment and exchanges heat with the battery monomer assembly. The heat exchange member includes an inlet and outlet portion. The first mounting beam forms an open slot on the side close to the wall of the box where the heat exchange member is arranged. The slot opening of the open slot faces the wall. The side of the first mounting beam away from the slot opening is connected to the first end plate. The inlet and outlet portion is arranged in the open slot. Since the first end plate is arranged on the side of the first mounting beam away from the slot opening, the connection stability between the first end plate and the first mounting beam is basically not affected by the open slot. When the battery monomer expands, the first end plate can well resist the expansion force of the battery monomer. The expansion force in the battery monomer assembly is evenly distributed, and the reliability of the battery device is high.

[0073] The technical solutions described in the embodiments of the present application are applicable to battery monomers, battery devices, and electric devices using battery devices.

[0074] The electric device includes but is not limited to electric vehicles, electric vehicles, ships, and spacecraft, etc. For example, the spacecraft includes airplanes, rockets, space shuttles, and spacecraft, etc.

[0075] The following embodiments are described for convenience with a vehicle 1000 as an example of an electric device according to an embodiment of the present application.

[0076] For example, FIG. 1 is a structural schematic diagram of a vehicle 1000 according to some embodiments of the present application. The vehicle 1000 can be a fuel vehicle, a gas vehicle, or a new energy vehicle. The new energy vehicle can be a pure electric vehicle, a hybrid vehicle, or a range extended vehicle. The vehicle 1000 can be provided with a motor 300, a controller 200, and a battery device 100. The controller 200 is configured to control the battery device 100 to supply power to the motor 300. For example, the battery device 100 can be arranged at the bottom, the front, or the rear of the vehicle 1000. The battery device 100 can be configured to supply power to the vehicle 1000. For example, the battery device 100 can be configured as an operating power source of the vehicle 1000, and can be configured to supply power to the circuit system of the vehicle 1000, such as the power required for starting, navigation, and operation of the vehicle 1000. In another embodiment of the present application, the battery device 100 can be configured as an operating power source of the vehicle 1000, and can be configured to replace or partially replace fuel or natural gas to provide driving power to the vehicle 1000.

[0077] In order to meet different power requirements, the battery device 100 can include a plurality of battery cells 12. The plurality of battery cells 12 can be connected in series, in parallel, or in a hybrid manner. The hybrid manner refers to a combination of series connection and parallel connection. The battery device 100 can also be referred to as a battery pack. Alternatively, the plurality of battery cells 12 can be connected in series, in parallel, or in a hybrid manner to form a battery module, and the plurality of battery modules can be connected in series, in parallel, or in a hybrid manner to form the battery device 100. That is, the plurality of battery cells 12 can be directly combined to form the battery device 100, or the plurality of battery cells 12 can be combined to form a battery module, and the battery module can be combined to form the battery device 100.

[0078] For example, please refer to FIG. 2, which is an exploded view of the battery device 100 according to some embodiments of the present application. The battery device 100 can include a plurality of battery cells 12. The battery device 100 can also include a box 11, which has a hollow structure, and the plurality of battery cells 12 can be accommodated in the box 11. As shown in FIG. 2, the first box 111 and the second box 112 are coupled together. The shapes of the first box 111 and the second box 112 can be determined according to the shape of the combination of the plurality of battery cells 12. The first box 111 and the second box 112 can each have an open surface. For example, the first box 111 and the second box 112 can each be a hollow cuboid and have only one surface as an open surface. The open surface of the first box 111 and the open surface of the second box 112 are arranged opposite to each other, and the first box 111 and the second box 112 are coupled to each other to form the box 11 having a closed cavity. The plurality of battery cells 12 can be combined in parallel, in series, or in a hybrid manner and then placed in the box 11 formed by the coupling of the first box 111 and the second box 112.

[0079] Optionally, the battery device 100 can further include other structures, which will not be described herein. For example, the battery device 100 can further include a busbar component for realizing electrical connection between the plurality of battery cells 12, such as parallel connection or series connection or mixed connection. Specifically, the busbar component can realize electrical connection between the battery cells 12 by connecting the electrode terminals of the battery cells 12. Further, the busbar component can be fixed to the electrode terminals of the battery cells 12 by welding. The electrical energy of the plurality of battery cells 12 can be further led out through the box 11 by the conductive mechanism.

[0080] According to different power requirements, the number of battery cells 12 can be set to any value. The plurality of battery cells 12 can be connected in series, parallel or mixed connection to achieve larger capacity or power. Since the number of battery cells 12 included in each battery device 100 can be large, in order to facilitate installation, the battery cells 12 can be arranged in groups, and each group of battery cells 12 forms a battery module. The number of battery cells 12 included in the battery module is not limited and can be set according to requirements. The battery device 100 can include a plurality of battery modules, and these battery modules can be connected in series, parallel or mixed connection.

[0081] According to some embodiments of the present application, referring to FIGS. 3-10, the present application provides a battery device 100, which includes a box 11, a first mounting beam 14, a second mounting beam 15, a battery cell assembly and a heat exchange member 13. The first mounting beam 14 and the second mounting beam 15 are spaced apart in the box 11 and form a battery compartment together with the box 11. The battery cell assembly is arranged in the battery compartment and includes a first end plate 16, a second end plate 17 and a plurality of battery cells 12 arranged between the first end plate 16 and the second end plate 17. The first end plate 16 and the second end plate 17 are connected to the first mounting beam 14 and the second mounting beam 15, respectively. The heat exchange member 13 is arranged in the battery compartment and exchanges heat with the battery cell assembly. The heat exchange member 13 includes an inlet and outlet portion 131. The first mounting beam 14 forms an open slot on the side close to the wall of the box 11 where the heat exchange member 13 is arranged. The slot opening faces the wall, and the side of the first mounting beam 14 away from the slot opening is connected to the first end plate 16. The inlet and outlet portion 131 is arranged in the open slot.

[0082] In some embodiments, the battery cell assembly is provided in plurality, and the battery cells 12 in the plurality of battery cell assemblies can correspond to one first end plate 16 and one second end plate 17. In other embodiments, the battery cells 12 in each battery cell assembly correspond to one first end plate 16 and one second end plate 17.

[0083] In some embodiments, the plurality of battery cells 12 can be fixed by a binding strap.

[0084] In some embodiments, the plurality of battery cells 12 can be fixed by a pressing strip.

[0085] In some embodiments, the heat exchange member 13 is a heat exchange pipe.

[0086] In some embodiments, the heat exchange member 13 is a heat exchange plate.

[0087] In some embodiments, the heat exchange member 13 includes a main body part 181 and an inlet and outlet part 131, the inlet and outlet part 131 and the main body part 181 are respectively located on two sides of the first mounting beam 14, the main body part 181 is used for heat exchange of the battery monomer assembly, and the inlet and outlet part 131 is used for leading out and leading in the heat exchange medium. The heat exchange medium can be in a liquid state, a gaseous state or a gas-liquid mixed state, etc.

[0088] In some embodiments, the inlet and outlet part 131 is a liquid inlet nozzle and a liquid outlet nozzle.

[0089] In some embodiments, the inlet and outlet part 131 is a current collector which communicates with the liquid inlet nozzle and the liquid outlet nozzle.

[0090] The wall of the box body 11 in which the heat exchange member 13 is arranged can be any wall of the box body 11. In some embodiments, the wall of the box body 11 in which the heat exchange member 13 is arranged is the bottom wall 113. The bottom wall 113 can refer to the lowermost wall of the box body 11 in the direction of gravity, or can refer to the wall below the battery monomer assembly in the direction of gravity. It can also refer to the wall for bearing the battery monomer 12.

[0091] In some embodiments, the first mounting beam 14 is a continuous beam, and the opening slot extends to the surface of the first mounting beam 14 facing the wall in which the heat exchange member 13 is arranged, but does not extend to the surface of the first mounting beam 14 away from the wall. Since the side of the first mounting beam 14 away from the slot is connected with the first end plate 16, the connecting surface of the first end plate 16 still forms a continuous surface, and the first end plate 16 can have relatively high connection stability.

[0092] In the above scheme, since the first end plate 16 is arranged on the side of the first mounting beam 14 away from the slot, the connection stability between the first end plate 16 and the first mounting beam 14 is basically not affected by the opening slot. When the battery monomer 12 expands, the first end plate 16 can better resist the expansion force of the battery monomer 12, the expansion force in the battery monomer assembly is more evenly distributed, and the reliability of the battery device 100 is higher.

[0093] According to some embodiments of the present application, referring to FIGS. 3-6, the first mounting beam 14 includes at least two beam bodies which are arranged at intervals along the first direction X, and the gap between the adjacent two beam bodies forms the opening slot.

[0094] By naturally forming the opening slot by segmenting the first mounting beam 14 to avoid the heat exchange member 13, it is not necessary to process the first mounting beam 14 by slotting or drilling, and each beam body itself has a relatively low risk of stress concentration.

[0095] In the above scheme, the opening groove is formed by the gap between the two adjacent beam bodies, the single beam body has high structural stability and stable bearing capacity.

[0096] According to some embodiments of the present application, referring to FIGS. 3-7, the battery device 100 further comprises a connecting bracket 18 connecting the at least two beam bodies.

[0097] In some embodiments, the connecting bracket 18 can connect the two beam bodies and cover the plurality of gaps.

[0098] In some embodiments, the connecting bracket 18 is provided in plurality, the first mounting beam 14 has a plurality of gaps, and the connecting bracket 18 corresponds to the gap one by one, and each connecting bracket 18 can connect the two adjacent beam bodies forming the gap corresponding thereto.

[0099] In the above scheme, the connecting bracket 18 is provided to make the two adjacent beam bodies have high structural stability as a whole.

[0100] According to some embodiments of the present application, referring to FIGS. 3-7, at least part of the connecting bracket 18 is located between the first end plate 16 and the first mounting beam 14.

[0101] In some embodiments, along the thickness direction of the wall portion where the heat exchange member 13 is arranged, the connecting bracket 18 can block part of the gap.

[0102] Since at least part of the connecting bracket 18 is located between the first end plate 16 and the first mounting beam 14, the connecting bracket 18 can provide a certain bearing capacity to the first end plate 16 although there is a gap.

[0103] In some embodiments, the connecting bracket 18 can be arranged between the first end plate 16 and the first mounting beam 14 by welding, bonding or the like.

[0104] In the above scheme, the first end plate 16 and the first mounting beam 14 have high connection stability, and thus the expansion force of the battery cell assembly is distributed more uniformly when the battery cell 12 expands and deforms.

[0105] According to some embodiments of the present application, referring to FIGS. 3-7, along the thickness direction of the wall body, the connecting bracket 18 covers the gap.

[0106] Along the thickness direction of the wall body, the connecting bracket 18 covers the gap, which means that although there is a gap, along the thickness direction of the wall body, the connecting point connected with the first end plate 16, such as a welding area, a bonding area, a fastener locking area (arranging a mounting hole), etc., can be arranged at the position corresponding to the connecting bracket 18 and the gap.

[0107] In the above scheme, the connecting bracket 18 covers the gap along the thickness direction of the wall body, and most of the connecting bracket 18 can be used as the connecting position of the first end plate 16 and the connecting bracket 18, which is beneficial to provide more connecting points for the first end plate 16 and improve the structural stability of the first end plate 16.

[0108] According to some embodiments of the present application, referring to FIGS. 3-7, the connecting bracket 18 is provided with a first mounting hole, the first mounting beam 14 is provided with a second mounting hole, and the first end plate 16 is connected to the first mounting beam 14 by a fastener penetrating the first mounting hole and the second mounting hole.

[0109] The first mounting hole and the second mounting hole can be the same or different in shape.

[0110] The first mounting hole and the second mounting hole can be one-to-one correspondence, or one of them can correspond to multiple others. For example, the first mounting hole is a strip-shaped hole, and the second mounting hole is a plurality of circular holes corresponding to the strip-shaped hole.

[0111] In the above scheme, the first end plate 16, the connecting bracket 18 and the first mounting beam 14 are connected by the fastener, the assembly deformation is small, and the cost is low.

[0112] According to some embodiments of the present application, referring to FIGS. 8-10, the box body 11 includes a bottom wall 113 for supporting the battery monomer assembly; the first mounting beam 14 has a first surface 141 away from the bottom wall 113, the connecting bracket 18 includes a main body part 181 and a first flange part 182, the main body part 181 is connected to the first surface 141 and covers the gap, and the first flange part 182 extends from the side of the main body part 181 away from the inlet and outlet part 131 to the bottom wall 113, and the first flange part 182 blocks the gap.

[0113] The first flange part 182 blocks the gap, which means that the first flange part 182 can bear part of the swelling force. For example, referring to FIG. 10, due to the arrangement of the first flange part 182, the swelling force below the battery monomer 12 can be resisted by the first flange part 182.

[0114] In some embodiments, there is a structural adhesive between the first flange part 182 and the battery monomer 12 close to it for fixing the battery monomer 12. The swelling force can be transmitted to the first flange part 182 by the structural adhesive.

[0115] In the above scheme, since the first flange part 182 blocks the gap, the first flange part 182 can also resist the swelling deformation of the battery monomer 12 close to the bottom wall 113 at the gap position, which reduces the risk of stress concentration during the swelling deformation of the battery monomer 12, makes the battery monomer assembly have higher stability, and improves the reliability of the battery device 100.

[0116] According to some embodiments of the present application, referring to FIGS. 7-10, the first mounting beam 14 has a second surface 142 facing away from the inlet and outlet portion 131, and the first flange portion 182 does not protrude from the second surface 142.

[0117] The first flange portion 182 does not protrude from the second surface 142, meaning that the assembly of the battery monomer 12 will not interfere with the first flange portion 182, and more battery monomers 12 can be arranged between the first mounting beam 14 and the second mounting beam 15.

[0118] In the above scheme, since the first flange portion 182 does not protrude from the second surface 142, the first flange portion 182 does not occupy the assembly space of the battery monomer 12, which is conducive to improving the energy density of the battery device 100.

[0119] According to some embodiments of the present application, referring to FIGS. 7-10, the first flange portion 182 does not contact the heat exchange member 13.

[0120] The first flange portion 182 does not contact the heat exchange member 13, which can also be referred to as a distance between the first flange portion 182 and the heat exchange member 13. Even if the first flange portion 182 has a machining error or the first flange portion 182 is deformed, the risk of the first flange portion 182 contacting the heat exchange member 13 is relatively low.

[0121] In the above scheme, since the first flange portion 182 does not contact the heat exchange member 13, the first flange portion 182 does not interfere with the heat exchange member 13, and the risk of the first flange portion 182 scratching the heat exchange member 13 is low, and the service life of the heat exchange member 13 is long.

[0122] According to some embodiments of the present application, referring to FIGS. 7-10, the connecting bracket 18 further includes a second flange portion 183, and the second flange portion 183 extends from the main body portion 181 to the bottom wall 113 near the inlet and outlet portion 131.

[0123] In some embodiments, the first mounting beam 14 has a third surface near the inlet and outlet portion 131, and the second flange portion can or can not protrude from the third surface.

[0124] Please refer to FIG. 7, the first flange portion 182 and the second flange portion form a connecting bracket 18 with a U-shaped cross section, which can be pre-assembled to the first mounting beam 14 during assembly and then continue subsequent assembly.

[0125] In the above scheme, the first flange portion 182 and the second flange portion can be pre-positioned when the connecting bracket 18 cooperates with the first mounting beam 14, which reduces the assembly difficulty of the connecting bracket 18.

[0126] According to some embodiments of this application, referring to Figures 7-10, the connecting bracket 18 further includes a reinforcing member 184, which is disposed on the side of the main body 181 facing the first surface 141 and is located within the notch.

[0127] The reinforcing member 184 can be connected to the main body 181 by means of welding, bonding, fastener connection, etc.

[0128] In an embodiment where the reinforcing member 184 is connected to the main body 181 by means of fasteners, countersunk holes for receiving some of the fasteners can be provided on the main body 181 so that the surface of the main body 181 facing away from the bottom wall 113 is a relatively flat surface.

[0129] In the above scheme, even if part of the first end plate 16 is set at the position corresponding to the notch, since the reinforcing member 184 is set at the position where the connecting bracket 18 covers the notch, the connecting bracket 18 can still provide a relatively stable load-bearing force for the first end plate 16, so that the first end plate 16 maintains a high connection stability.

[0130] According to some embodiments of this application, referring to Figures 5 and 6, the heat exchanger 13 includes a first heat exchange tube 132 and a second heat exchange tube 133; the first mounting beam 14 includes a first beam body 143, a second beam body 144 and a third beam body 145 arranged at intervals, the two ends of the first heat exchange tube 132 pass through the gap between the first beam body 143 and the second beam body 144, and the two ends of the second heat exchange tube 133 pass through the gap between the second beam body 144 and the third beam body 145.

[0131] The fact that the two heat exchange tubes pass through different gaps means that part of the gap between the two heat exchange tubes can be eliminated. In other words, a beam is installed in the gap between the two heat exchange tubes, namely the second beam 144 in Figure 6.

[0132] In the above scheme, the two heat exchange tubes pass through different gaps, so that there is still a second beam 144 between the positions where the two heat exchange tubes pass through the first mounting beam 14, and the first end plate 16 has high connection stability.

[0133] According to some embodiments of this application, the heat exchanger 13 includes a first heat exchange tube 132 and a second heat exchange tube 133; the first mounting beam 14 includes a fourth beam and a fifth beam spaced apart, the two ends of the first heat exchange tube 132 pass through the gap between the fourth beam and the fifth beam, and the two ends of the second heat exchange tube 133 pass through the gap between the fourth beam and the fifth beam.

[0134] In the above scheme, the two heat exchange tubes pass through the first mounting beam 14 through the same notch, which can reduce the design and processing difficulty of the first mounting beam 14 and save production costs.

[0135] According to some embodiments of this application, referring to FIG6, the housing 11 includes a bottom wall 113 for supporting the battery cell assembly. A groove is formed on the side of the bottom wall 113 facing the battery cell assembly, and the heat exchanger 13 is embedded in the groove.

[0136] In some embodiments, when connecting the battery cell 12 and the bottom wall 113 with colloid, the amount of colloid used can be reduced and costs can be saved because the heat exchanger 13 is embedded in the groove. At the same time, the colloid is distributed relatively evenly and the connection stability is relatively high.

[0137] In the above scheme, when assembling the heat exchanger 13, the groove can be used to preposition the heat exchanger 13, reducing the assembly difficulty of the heat exchanger 13.

[0138] According to some embodiments of this application, please refer to FIG6, along the thickness direction of the bottom wall 113, the surface of the heat exchanger 13 facing the battery cell assembly is flush with the surface of the bottom wall 113 facing the battery cell assembly.

[0139] Along the thickness direction of the bottom wall 113, the surface of the heat exchanger 13 facing the battery cell assembly is flush with the surface of the bottom wall 113 facing the battery cell assembly, which means that the weight of the battery cell 12 can be partially borne by the bottom wall 113.

[0140] In the above scheme, since the surface of the heat exchanger 13 facing the battery cell assembly is flush with the surface of the bottom wall 113 facing the battery cell assembly, part of the weight of the battery cell assembly can be shared by the bottom wall 113, which reduces the risk of deformation and damage to the heat exchanger 13 due to excessive stress and improves the reliability of the battery device 100.

[0141] According to some embodiments of this application, referring to Figures 5 and 6, the heat exchanger 13 includes a first heat exchange tube 132 and a second heat exchange tube 133; the first heat exchange tube 132 has a first tube segment and a second tube segment arranged side by side and extending in a tortuous manner, one end of the first tube segment is connected to the inlet / outlet portion 131, one end of the second tube segment is connected to the inlet / outlet portion 131, and the other end of the first tube segment is connected to the other end of the second tube segment; the second heat exchange tube 133 has a third tube segment and a fourth tube segment arranged side by side and extending in a tortuous manner, one end of the third tube segment is connected to the inlet / outlet portion 131, one end of the fourth tube segment is connected to the inlet / outlet portion 131, and the other end of the third tube segment is connected to the other end of the fourth tube segment.

[0142] The first pipe section is where the heat exchange medium flows in, and the second pipe section is where it flows out. The heat exchange medium is used for heat dissipation. Referring to Figure 6, the heat exchange medium has its lowest temperature after flowing into the first pipe section and its highest temperature after flowing out of the second pipe section after heat exchange. Since the first and second pipe sections are arranged side-by-side, the highest temperature portion of the first pipe section corresponds precisely to the lowest temperature portion of the second pipe section. That is, during the flow of the heat exchange medium through the first heat exchange tube 132, the relatively high-temperature portion always corresponds to the relatively low-temperature portion, ensuring a relatively uniform overall temperature of the first heat exchange tube 132.

[0143] In the above scheme, because the first and second pipe sections, as well as the third and fourth pipe sections, extend in a tortuous manner, the heat exchanger 13 can have a higher heat exchange area within the same space, thereby improving the energy density of the battery device 100. Furthermore, since the first and second pipe sections, and the third and fourth pipe sections, are arranged side-by-side, the corresponding portions of the heat exchange areas formed between the first and second pipe sections have relatively uniform temperatures, and the corresponding portions of the heat exchange areas formed between the third and fourth pipe sections also have relatively uniform temperatures. This results in a more uniform temperature difference between the entire first heat exchanger tube 132 and the entire second heat exchanger tube 133, reducing the risk of thermal stress concentration and increasing reliability.

[0144] According to some embodiments of this application, please refer to Figures 5 and 6, the first heat exchange tube 132 and the second heat exchange tube 133 are symmetrically arranged.

[0145] The symmetrical arrangement of the first heat exchange tube 132 and the second heat exchange tube 133 means that after the first heat exchange tube 132 is assembled, the second heat exchange tube 133 has a reference, which can prevent mistakes. For example, due to the symmetrical arrangement, after the first heat exchange tube 132 is assembled, it is not necessary to match the inlet and outlet of the second heat exchange tube 133 one by one; the assembly can be completed by maintaining a symmetrical state.

[0146] In the above scheme, since the first heat exchange tube 132 and the second heat exchange tube 133 are symmetrically arranged, the positioning of the two heat exchange tubes is easier and the assembly difficulty is lower.

[0147] According to some embodiments of this application, the first mounting beam 14 is a continuous beam.

[0148] In some embodiments, a through groove can be machined through the first mounting beam 14 along a second direction (the arrangement direction of the plurality of battery cells 12). The through groove extends to the surface of the wall portion of the housing 11 where the heat exchanger 13 is disposed, but does not extend to the surface of the first mounting beam 14 near the first end plate 16.

[0149] In the above scheme, since the first mounting beam 14 is a continuous beam, the processing cost of the first mounting beam 14 is low and the assembly difficulty is low.

[0150] According to some embodiments of this application, please refer to FIG1. ​​This application provides an electrical device including the battery device 100 of the above scheme, the battery device 100 being used to provide electrical energy.

[0151] The battery device 100 mentioned in the embodiments of this application refers to a single physical module that includes one or more battery cells 12 to provide higher voltage and capacity.

[0152] In some embodiments, the battery device 100 includes a housing 11.

[0153] In some embodiments, the battery device 100 can be a battery module. When there are multiple battery cells 12, the multiple battery cells 12 are arranged and fixed to form a battery module.

[0154] In some embodiments, the battery device 100 may be a battery pack, which includes a housing 11 and battery cells 12, wherein the battery cells 12 or battery modules are housed in the housing 11.

[0155] In some embodiments, the housing 11 may be part of the chassis structure of the vehicle 1000. For example, a portion of the housing 11 may be at least a portion of the floor of the vehicle 1000, or a portion of the housing 11 may be at least a portion of the crossbeams and longitudinal beams of the vehicle 1000.

[0156] In some embodiments, the battery device 100 may be an energy storage device. Energy storage devices include energy storage containers, energy storage cabinets, etc.

[0157] Because the battery device 100 described above has high reliability, the power supply device including the battery device 100 described above also has high reliability.

[0158] According to some embodiments of this application, referring to Figures 3-10, this application provides a battery device 100. The battery device 100 includes a housing 11, a first mounting beam 14, a second mounting beam 15, a battery cell assembly, and a heat exchanger 13. The housing 11 includes a bottom wall 113 for supporting the battery cell assembly. The first mounting beam 14 and the second mounting beam 15 are spaced apart within the housing 11, forming a battery compartment together with the housing 11. The battery cell assembly is disposed in the battery compartment and includes a first end plate 16, a second end plate 17, and a plurality of battery cells 12 disposed between the first end plate 16 and the second end plate 17. The first end plate 16 and the second end plate 17 are respectively connected to the first mounting beam 14 and the second mounting beam 15. A groove is formed on the side of the bottom wall 113 facing the battery cell assembly, and the heat exchanger 13 is embedded in the groove, engaging with the battery cell assembly for heat exchange. The heat exchanger 13 includes an inlet / outlet portion 131. An opening groove is formed on the side of the first mounting beam 14 near the wall of the housing 11 where the heat exchanger 13 is installed, with the opening of the opening groove facing the bottom wall 113.

[0159] The heat exchanger 13 includes a first heat exchange tube 132 and a second heat exchange tube 133. The first mounting beam 14 includes a first beam 143, a second beam 144 and a third beam 145 spaced apart, which are spaced apart along a first direction X. The housing 11 also includes two side walls surrounding the bottom wall 113 and opposite each other along the first direction X. The first beam 143 is connected to one of the side walls and the third beam 145 is connected to the other side wall.

[0160] Both ends of the first heat exchange tube 132 pass through the gap between the first beam 143 and the second beam 144, and both ends of the second heat exchange tube 133 pass through the gap between the second beam 144 and the third beam 145. The liquid inlet and liquid outlet ends of the first heat exchange tube 132 and the second heat exchange tube 133 both pass through the first mounting beam 14 through the gap.

[0161] The connecting bracket 18 includes a main body 181 and a first flange 182. The main body 181 connects a first beam 143, a second beam 144, and a third beam 145. At least a portion of the connecting bracket 18 is located between a first end plate 16 and a first mounting beam 14. The first mounting beam 14 has a first surface 141 facing away from the bottom wall 113. The main body 181 is connected to the first surface 141 and covers a notch. The first flange 182 extends from the side of the main body 181 facing away from the inlet / outlet portion 131 toward the bottom wall 113, and the first flange 182 covers the notch. The main body 181 covers the notch along the thickness direction of the bottom wall 113. The first mounting beam 14 has a second surface 142 facing away from the inlet / outlet portion 131, and the first flange 182 does not protrude from the second surface 142. The first flange 182 does not contact the heat exchanger 13. The connecting bracket 18 also includes a second flange 183, which extends from the side of the main body 181 near the inlet / outlet portion 131 toward the bottom wall 113. The connecting bracket 18 also includes a reinforcing member 184, which is disposed on the side of the main body 181 facing the first surface 141 and is located within a notch. The main body 181 has a first mounting hole, and the first mounting beam 14 has a second mounting hole. The first end plate 16 is connected to the first mounting beam 14 by fasteners passing through the first and second mounting holes.

[0162] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and they should all be covered within the scope of the claims and specification of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery device, characterized in that, include: Box; The first mounting beam and the second mounting beam are spaced apart inside the housing and together with the housing, they form the battery compartment. A battery cell assembly is disposed in the battery compartment and includes a first end plate, a second end plate, and a plurality of battery cells disposed between the first end plate and the second end plate. The first end plate and the second end plate are respectively connected to the first mounting beam and the second mounting beam. A heat exchanger is disposed in the battery compartment and engages with the battery cell assembly for heat exchange. The heat exchanger includes an inlet and outlet section. Wherein, an opening groove is formed on the side of the first mounting beam near the wall where the heat exchanger is installed in the box body, the opening of the opening groove faces the wall, the side of the first mounting beam away from the opening groove is connected to the first end plate, and the inlet and outlet parts pass through the opening groove.

2. The battery device according to claim 1, characterized in that, The first mounting beam includes at least two beam segments spaced apart along a first direction, and the notch between two adjacent beam segments forms the opening slot.

3. The battery device according to claim 2, characterized in that, The battery device also includes a connecting bracket that connects at least two sections of the beam.

4. The battery device according to claim 3, characterized in that, At least a portion of the connecting bracket is located between the first end plate and the first mounting beam.

5. The battery device according to claim 3 or 4, characterized in that, Along the thickness direction of the wall, the connecting bracket covers the notch.

6. The battery device according to any one of claims 3-5, characterized in that, The connecting bracket is provided with a first mounting hole, the first mounting beam is provided with a second mounting hole, and the first end plate is connected to the first mounting beam by fasteners passing through the first mounting hole and the second mounting hole.

7. The battery device according to any one of claims 3-6, characterized in that, The housing includes a bottom wall, which is used to support the battery cell assembly; The first mounting beam has a first surface facing away from the bottom wall. The connecting bracket includes a main body and a first flange. The main body is connected to the first surface and covers the notch. The first flange extends from the side of the main body facing away from the inlet / outlet towards the bottom wall and covers the notch.

8. The battery device according to claim 7, characterized in that, The first mounting beam has a second surface facing away from the inlet / outlet portion, and the first flange portion does not protrude from the second surface.

9. The battery device according to claim 7 or 8, characterized in that, The first flanged portion does not contact the heat exchanger.

10. The battery device according to any one of claims 7-9, characterized in that, The connecting bracket also includes a second flange, which extends from the main body near the inlet / outlet side toward the bottom wall.

11. The battery device according to any one of claims 7-10, characterized in that, The connecting bracket further includes a reinforcing member disposed on the side of the main body facing the first surface, and the reinforcing member is located within the notch.

12. The battery device according to any one of claims 2-11, characterized in that, The heat exchanger includes a first heat exchange tube and a second heat exchange tube; The first mounting beam includes a first beam, a second beam, and a third beam spaced apart. The two ends of the first heat exchange tube pass through the gap between the first beam and the second beam, and the two ends of the second heat exchange tube pass through the gap between the second beam and the third beam.

13. The battery device according to any one of claims 2-11, characterized in that, The heat exchanger includes a first heat exchange tube and a second heat exchange tube; The first mounting beam includes a fourth beam and a fifth beam spaced apart. The two ends of the first heat exchange tube pass through the gap between the fourth beam and the fifth beam, and the two ends of the second heat exchange tube pass through the gap between the fourth beam and the fifth beam.

14. The battery device according to any one of claims 1-13, characterized in that, The housing includes a bottom wall, which is used to support the battery cell assembly; A groove is formed on the side of the bottom wall facing the battery cell assembly, and the heat exchanger is embedded in the groove.

15. The battery device according to claim 14, characterized in that, Along the thickness direction of the bottom wall, the surface of the heat exchanger facing the battery cell assembly is flush with the surface of the bottom wall facing the battery cell assembly.

16. The battery device according to any one of claims 1-15, characterized in that, The heat exchanger includes a first heat exchange tube and a second heat exchange tube; The first heat exchange tube has a first tube section and a second tube section arranged side by side and extending in a tortuous manner. One end of the first tube section is connected to the inlet and outlet section, one end of the second tube section is connected to the inlet and outlet section, and the other end of the first tube section is connected to the other end of the second tube section. The second heat exchange tube has a third and a fourth tube section arranged side by side and extending in a tortuous manner. One end of the third tube section is connected to the inlet and outlet section, one end of the fourth tube section is connected to the inlet and outlet section, and the other end of the third tube section is connected to the other end of the fourth tube section.

17. The battery device according to claim 16, characterized in that, The first heat exchange tube and the second heat exchange tube are arranged symmetrically.

18. The battery device according to claim 1, characterized in that, The first mounting beam is a continuous beam.

19. An electrical appliance, characterized in that, The battery device includes any one of claims 1-18, the battery device being used to provide electrical energy.

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